1 /* Copyright (c) 2007-2012. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #include "smx_private.h"
8 #include "xbt/sysdep.h"
13 //If you need to log some stuffs, just uncomment these two lines and uses XBT_DEBUG for instance
14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_vm, simix, "Logging specific to SIMIX (vms)");
16 /* **** create a VM **** */
19 * \brief Internal function to create a SIMIX host.
20 * \param name name of the host to create
21 * \param data some user data (may be NULL)
23 smx_host_t SIMIX_vm_create(const char *name, smx_host_t ind_phys_host)
26 smx_host_priv_t smx_host = xbt_new0(s_smx_host_priv_t, 1);
29 // TODO check why we do not have any VM here and why we have the host_proc_hookup ?
32 smx_host->data = NULL;
33 smx_host->process_list =
34 xbt_swag_new(xbt_swag_offset(proc, host_proc_hookup));
36 /* Update global variables */
37 xbt_lib_set(host_lib,name,SIMIX_HOST_LEVEL,smx_host);
39 /* Create surf associated resource */
40 // TODO change phys_host into the right workstation surf model
41 surf_vm_workstation_model->extension.vm_workstation.create(name, ind_phys_host);
43 return xbt_lib_get_elm_or_null(host_lib, name);
47 smx_host_t SIMIX_pre_vm_create(smx_simcall_t simcall, const char *name, smx_host_t ind_phys_host){
48 return SIMIX_vm_create(name, ind_phys_host);
52 /* **** start a VM **** */
53 static int __can_be_started(smx_host_t vm){
54 // TODO add checking code related to overcommitment or not.
57 void SIMIX_vm_start(smx_host_t ind_vm){
59 //TODO only start the VM if you can
60 if (__can_be_started(ind_vm))
61 SIMIX_vm_set_state(ind_vm, msg_vm_state_running);
63 THROWF(vm_error, 0, "The VM %s cannot be started", SIMIX_host_get_name(ind_vm));
66 void SIMIX_pre_vm_start(smx_simcall_t simcall, smx_host_t ind_vm){
67 SIMIX_vm_start(ind_vm);
70 /* ***** set/get state of a VM ***** */
71 void SIMIX_vm_set_state(smx_host_t ind_vm, int state){
72 surf_vm_workstation_model->extension.vm_workstation.set_state(ind_vm, state);
74 void SIMIX_pre_vm_set_state(smx_host_t ind_vm, int state){
75 SIMIX_vm_set_state(ind_vm, state);
78 int SIMIX_vm_get_state(smx_host_t ind_vm){
79 return surf_vm_workstation_model->extension.vm_workstation.get_state(ind_vm);
81 int SIMIX_pre_vm_get_state(smx_host_t ind_vm){
82 return SIMIX_vm_get_state(ind_vm);
86 * \brief Function to migrate a SIMIX VM host. This function stops the exection of the
87 * VM. All the processes on this VM will pause. The state of the VM is
88 * perserved. We can later resume it again.
90 * \param host the vm host to migrate (a smx_host_t)
92 void SIMIX_vm_migrate(smx_host_t ind_vm, smx_host_t ind_dst_pm)
94 /* TODO: check state */
96 /* TODO: Using the variable of the MSG layer is not clean. */
97 SIMIX_vm_set_state(ind_vm, msg_vm_state_migrating);
99 /* jump to vm_ws_migrate(). this will update the vm location. */
100 surf_vm_workstation_model->extension.vm_workstation.migrate(ind_vm, ind_dst_pm);
102 SIMIX_vm_set_state(ind_vm, msg_vm_state_running);
105 void SIMIX_pre_vm_migrate(smx_simcall_t simcall, smx_host_t ind_vm, smx_host_t ind_dst_pm){
106 SIMIX_vm_migrate(ind_vm, ind_dst_pm);
110 * \brief Function to get the physical host of the given the SIMIX VM host.
112 * \param host the vm host to get_phys_host (a smx_host_t)
114 const char *SIMIX_vm_get_phys_host(smx_host_t ind_vm)
116 /* jump to vm_ws_get_phys_host(). this will update the vm location. */
117 return surf_vm_workstation_model->extension.vm_workstation.get_phys_host(ind_vm);
120 const char *SIMIX_pre_vm_get_phys_host(smx_simcall_t simcall, smx_host_t ind_vm){
121 return SIMIX_vm_get_phys_host(ind_vm);
125 * \brief Function to suspend a SIMIX VM host. This function stops the exection of the
126 * VM. All the processes on this VM will pause. The state of the VM is
127 * perserved. We can later resume it again.
129 * \param host the vm host to suspend (a smx_host_t)
131 void SIMIX_vm_suspend(smx_host_t ind_vm)
133 /* TODO: check state */
135 XBT_DEBUG("%lu processes in the VM", xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
137 smx_process_t smx_process, smx_process_safe;
138 xbt_swag_foreach_safe(smx_process, smx_process_safe, SIMIX_host_priv(ind_vm)->process_list) {
139 XBT_DEBUG("suspend %s", SIMIX_host_get_name(ind_vm));
140 /* FIXME: calling a simcall from the SIMIX layer is strange. */
141 simcall_process_suspend(smx_process);
144 /* TODO: Using the variable of the MSG layer is not clean. */
145 SIMIX_vm_set_state(ind_vm, msg_vm_state_suspended);
148 void SIMIX_pre_vm_suspend(smx_simcall_t simcall, smx_host_t ind_vm){
149 SIMIX_vm_suspend(ind_vm);
153 * \brief Function to resume a SIMIX VM host. This function restart the execution of the
154 * VM. All the processes on this VM will run again.
156 * \param host the vm host to resume (a smx_host_t)
158 void SIMIX_vm_resume(smx_host_t ind_vm)
160 /* TODO: check state */
162 XBT_DEBUG("%lu processes in the VM", xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
164 smx_process_t smx_process, smx_process_safe;
165 xbt_swag_foreach_safe(smx_process, smx_process_safe, SIMIX_host_priv(ind_vm)->process_list) {
166 XBT_DEBUG("resume %s", SIMIX_host_get_name(ind_vm));
167 /* FIXME: calling a simcall from the SIMIX layer is strange. */
168 simcall_process_resume(smx_process);
171 /* TODO: Using the variable of the MSG layer is not clean. */
172 SIMIX_vm_set_state(ind_vm, msg_vm_state_running);
175 void SIMIX_pre_vm_resume(smx_simcall_t simcall, smx_host_t ind_vm){
176 SIMIX_vm_resume(ind_vm);
180 * \brief Function to shutdown a SIMIX VM host. This function powers off the
181 * VM. All the processes on this VM will be killed. But, the state of the VM is
182 * perserved. We can later start it again.
184 * \param host the vm host to shutdown (a smx_host_t)
186 void SIMIX_vm_shutdown(smx_host_t ind_vm, smx_process_t issuer)
188 /* TODO: check state */
190 XBT_DEBUG("%lu processes in the VM", xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
192 smx_process_t smx_process, smx_process_safe;
193 xbt_swag_foreach_safe(smx_process, smx_process_safe, SIMIX_host_priv(ind_vm)->process_list) {
194 XBT_DEBUG("kill %s", SIMIX_host_get_name(ind_vm));
196 SIMIX_process_kill(smx_process, issuer);
199 /* TODO: Using the variable of the MSG layer is not clean. */
200 SIMIX_vm_set_state(ind_vm, msg_vm_state_sleeping);
203 void SIMIX_pre_vm_shutdown(smx_simcall_t simcall, smx_host_t ind_vm){
204 SIMIX_vm_shutdown(ind_vm, simcall->issuer);
208 * \brief Function to destroy a SIMIX VM host.
210 * \param host the vm host to destroy (a smx_host_t)
212 void SIMIX_vm_destroy(smx_host_t ind_vm)
214 /* this code basically performs a similar thing like SIMIX_host_destroy() */
216 xbt_assert((ind_vm != NULL), "Invalid parameters");
217 const char *hostname = SIMIX_host_get_name(ind_vm);
219 smx_host_priv_t host_priv = SIMIX_host_priv(ind_vm);
221 /* this will call the registered callback function, i.e., SIMIX_host_destroy(). */
222 xbt_lib_unset(host_lib, hostname, SIMIX_HOST_LEVEL);
224 /* jump to vm_ws_destroy(). The surf level resource will be freed. */
225 surf_vm_workstation_model->extension.vm_workstation.destroy(ind_vm);
228 void SIMIX_pre_vm_destroy(smx_simcall_t simcall, smx_host_t ind_vm){
229 SIMIX_vm_destroy(ind_vm);